docs: def export(request, page_id, export_unpublished=False):
      """
      API endpoint of this source site to export a part of the page tree
      rooted at page_id
  
      Requests are made by a destination site's import_from_api view.
      """
      try:
          if export_unpublished:
              root_page = Page.objects.get(id=page_id)
          else:
              root_page = Page.objects.get(id=page_id, live=True)
      except Page.DoesNotExist:
          return JsonResponse({'error': _('page not found')})
  
      payload = export_pages(root_page, export_unpublished=export_unpublished)
  
      return JsonResponse(payload)